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The intensity of a sound wave while pass...

The intensity of a sound wave while passing through an elastic medium falls down by 10% as it covers one meter distance through the medium. If the initial intensity of the sound wave was 100 db its value after it has passed through 3 meter thickness of the medium will be

A

70 ab

B

81 ab

C

72.9 ab

D

60 ab

Text Solution

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The correct Answer is:
C
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